[EN] IMPROVED AMINOHYDROXYLATION OF ALKENES<br/>[FR] AMINOHYDROXYLATION AMÉLIORÉE D'ALCÈNES
申请人:IND RES LTD
公开号:WO2011159177A1
公开(公告)日:2011-12-22
The invention relates to a process for the aminohydroxylation of alkenes using N-oxycarbamate reagents, e.g. N-acyloxycarbamate, N-alkyloxycarbonyloxycarbamate and N-aralkoxycarbonyloxycarbamate reagents. The invention particularly relates to an intermolecular aminohydroxylation reaction that can be carried out in the absence of added base. The invention also relates to novel N-oxycarbamate reagents that are stable crystalline materials. The process of the invention is useful in the synthesis of compounds having a vicinal amino alcohol moiety, such as biologically active compounds.
Asymmetric Synthesis of α-Chloro-β-amino-<i>N</i>-sulfinyl Imidates as Chiral Building Blocks
作者:Filip Colpaert、Sven Mangelinckx、Stijn De Brabandere、Norbert De Kimpe
DOI:10.1021/jo200082w
日期:2011.4.1
New chiral α-chloro-β-amino-N-sulfinyl imidates were synthesized in high yield and excellent diastereomeric excess via highly anti-selective Mannich-typereactions of (RS)-methyl N-tert-butanesulfinyl-2-chloroethanimidate with aromatic aldimines. The α-chloro-β-amino-N-sulfinylimidates proved to be excellent building blocks for the asymmetric synthesis of β-amino-α-chloro amides and esters, aziridine-2-carboxylic
The invention relates to a process for the aminohydroxylation of alkenes using N-oxycarbamate reagents, e.g. N-acyloxycarbamate, N-alkyloxycarbonyloxycarbamate and N-aralkoxycarbonyloxycarbamate reagents. The invention particularly relates to an intermolecular aminohydroxylation reaction that can be carried out in the absence of added base. The invention also relates to novel N-oxycarbamate reagents that are stable crystalline materials. The process of the invention is useful in the synthesis of compounds having a vicinal amino alcohol moiety, such as biologically active compounds.
Alkyl 4-Chlorobenzoyloxycarbamates as Highly Effective Nitrogen Source Reagents for the Base-Free, Intermolecular Aminohydroxylation Reaction
作者:Lawrence Harris、Simon P. H. Mee、Richard H. Furneaux、Graeme J. Gainsford、Andreas Luxenburger
DOI:10.1021/jo1018816
日期:2011.1.21
Ethyl- (7), benzyl- (8), tert-butyl- (9), and fluorenylmethyl-4-chlorobenzoyloxycarbamates (10) have been prepared as storable and easy-to-prepare nitrogen sources for use in the intermolecular Sharpless aminohydroxylation reaction and its asymmetric variant. These reagents were found to be effective under base-free reaction conditions. The scope and limitations of these methods have been explored using a variety of alkenes, among which, trans-cinnamates, in particular, proved to be good substrates.